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Note Loans (Changes in the carrying amount and the accretable yield for the acquired loans) (Parenthetical) (Detail) - ASC Subtopic 310-30 - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Carrying amount | $ 1,883,556 | [1] | $ 2,108,993 | $ 2,301,024
Accretable yield | 1,092,504 | [2] | 1,214,488 | $ 1,288,983
Non-credit Impaired Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Carrying amount | 1,400,000 |  | 1,600,000 |
Accretable yield | $ 800,000 |  | $ 900,000 |
[1] | At December 31, 2018, includes $1.4 billion of loans considered non-credit impaired at the acquisition date (December 31, 2017 - $1.6 billion).
[2] | At December 31, 2018, includes $0.8 billion for loans considered non-credit impaired at the acquisition date (December 31, 2017 - $0.9 billion).

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